Eventlet is a networking library written in Python. It achieves high scalability by using non-blocking io while at the same time retaining high programmer usability by using coroutines to make the non-blocking io operations appear blocking at the source code level.

Reading some more about it, it seems even closer to the Stackless conceptual layout, with a built-in channels mechanism/library as well. (I’d like deeper into there, but the MediaWiki thingy that Linden Labs is using appears to require a login to just see the pages… Either that or there’s a lot of missing wiki pages that are linked up).

Guess I’ll have to redo my hackysack implementation with this library and see how it compares…